So I learned something interesting via Instagram from Altinay Meerschaum pipes. Apparently Altinay actually used to make SMS meerschaum pipes for about 10 years when SMS were founded (in the European and Chinese markets). Since then SMS has continued with apprentices of Necdet Altinay (founder of Altinay Meerschaum Pipes). Which makes sense, because from what I've seen with my recent acquisitions as well as other examples; the quality of the pipes, carving styles, logo/stamp are all very similar.
Per the information given; Altinay also used to make meerschaum pipes for Dunhill, Peterson, Savinelli, and Butz Choquin. I wasn't aware that Savinelli and Butz Choquin even had meerschaum pipes available. As a fan of Savinelli pipes, I think it would be great to own a Savinelli meerschaum pipe. I'm going to have to keep an eye out for one of those as I've never seen one before.